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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2014/35461
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| Title: | Calibration Results for J-ERS-1 SAR Data Produced by the Alaska SAR Facility |
| Authors: | Freeman, A.
Alves, M.
Williams, J. |
| Issue Date: | Aug-1993 |
| Citation: | IEEE, Geoscience & Remote Sensing
Tokyo, Japan |
| Abstract: | The Alaska SAR Facility has been receiving and processing SAR data from the J-ERS-1 satellite since Spring 1992. Corner reflectors have been set up for J-ERS-1 SAR calibration at a site near Delta Junction, in central Alaska. Image quality and calibration analysis results from the Delta Junction site and others will be presented in this paper. The impact of the 3-bit Analog-to-Digital Converter and the automatic stepping of the gain as a function of range in the J-ERS-1 radar receiver on calibration performance has been assessed. Preliminary observations on J-ERS-1 SAR data are that the average Signal-to-Noise ratio is generally fairly low, in the range 5-6 dB. Azimuth ambiguity levels are higher than preflight analysis indicated. Over land, the dynamic range in the backscatter at L-band for approximately 36 degree incidence angle is often fairly high... |
| URI: | http://hdl.handle.net/2014/35461 |
| Appears in Collections: | JPL TRS 1992+
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